Heat oil in a large wok or pan set over a medium heat until hot,add the green chili, ginger and garlic,saute for a minute,then add the finely sliced onions,saute well until onion become light brown.
add the tomatoes and saute well until oil separates.Then reduce the flame and add chili powder,coriander powder,turmeric powder and cumin powder, stir well.
Then add the chicken pieces and stir well in a high flame for one minute then add salt,mix well and cover with a lid(if necessary add 1/4 cup water).cook in low flame for 25 minutes,stir in between.once chicken cooked well switch of the stove.add garam masala and stir well.cover with the lid and keep aside.
Clean and cut onion and capsicum in to medium size cubes
then heat oil in a pan or wok,then add the cumin seeds, saute well until fragrant,then add the chopped bell peppers and onion,add little salt.
then saute in high flame for 3-5 minutes,
add this to the cooked chicken,stir well,check salt consistency,add more if needed.cover with a lid and keep aside for 3 minutes.serve hot with rice or nan